chore: add ImportError to getSessionKey and make_splunkhome_path

Author: sgoral-splunk

solnlib/splunkenv.py

@@ -42,15 +42,15 @@ def simpleRequest(*args, **kwargs):
 except ImportError:
 
     def getSessionKey(*args, **kwargs):
-        return None
+        raise ImportError("This module requires Splunk to be installed.")
 
 
 try:
     from splunk.clilib.bundle_paths import make_splunkhome_path as msp
 except ImportError:
 
     def msp(*args, **kwargs):
-        return None
+        raise ImportError("This module requires Splunk to be installed.")
 
 
 __all__ = [